JP3373248B2 - Plastic metering pump for low viscous media - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention delivers a metered, low-viscosity, particularly pasty medium quantity from a bottle-, capsule- or tube-shaped container having a spring-elastic bellows as a pumping member. And a bellows, wherein the bellows include a shape-stable casing upper portion, and a shape-stable casing lower portion that is telescopically movable coaxially with respect to the casing upper portion. Are arranged so as to connect them, and the inner chamber of the bellows forms a pumping chamber for pumping the medium by a pumping action, and the upper end portion of the bellows has at least one paste passage opening and beauty close contact with the radially intermediate wall of the ring wall of the casing upper part having a small no <br/> least one exhaust valve, also the bellows lower end portion under the casing A suction valve and a suction connection pipe, which are in close contact with the ring collar of the radial partition of the part, and in which the upper part of the casing has an outlet and the lower part of the casing communicates the container with the pumping chamber. A metering pump of the type which comprises a piece and in which the suction valve is connected or can be connected to the container by means of the suction connection piece.

[0002]

2. Description of the Prior Art Metering pumps of the type mentioned are known, for example, from German Utility Model Registration No. 8800880.0. In this case, the middle wall of the upper casing part, which is telescopically guided in the lower casing part, has a downward connecting pipe towards the partition or suction valve, which connecting pipe is a reinforcement of the bellows. It is liquid-tightly surrounded by the ring collar. The connecting pipe piece has a conical ring surface for a valve seat on an upper side, and a valve closing member elastically seats on the conical ring surface, the valve closing member closing a two-part casing upper part. It is elastically supported on the end wall and is axially movably guided by axial cross ribs in the connecting piece. The upper part of the casing is 2
Of the two hollow bodies, the first hollow body having a cylindrical guide wall, by means of which the first hollow body has two ends in the lower part of the casing. It is movably guided between the positions in the axial direction. The second hollow body of the casing upper part, which is fitted in the cylindrical peripheral wall part projecting upward at the upper part of the intermediate wall, has an eccentric passage-shaped outlet, which outlet extends parallel to the axis. And directly communicating with the hollow chamber in which the valve closing member of the discharge valve is installed, and while the casing upper portion moves downward relative to the casing lower portion during the entire discharge stroke, The hollow chamber is connected to the inner chamber of the bellows via the discharge valve.

For example, European Patent Application Publication No. 0194417.
In a metering pump of the type mentioned above, which also corresponds to the metering pump described in the specification and which has a bellows as the pumping member, in principle two or more different media are simultaneously sucked and discharged from different containers. It is possible. However, it is not possible to control the admixture of these media, since all the media sucked together flow through the same pumping chamber formed by the inner chamber of the bellows. It is therefore impractical to add a second medium, for example a medium of a different color, in the form of strips to the main medium.

Also known from US Pat. No. 4,438,871 is a paste dispenser which is already known, but which does not have a bellows as the pumping member, but rather two manual pump pistons. However, the pump piston cooperates with the suction valve from two separate paste containers which are arranged concentrically inside and outside one another and each have a follow-up piston.
The seed medium is sucked in simultaneously and is pumped through separate passages into a dam chamber immediately before the outlet. The damming chamber encloses a ram-shaped closing member arranged on an elastic diaphragm wall which is loaded by the discharge pressure of the medium.

Both pump pistons are arranged coaxially with one another, are fixedly connected to one another and have a common actuating member which is actuated manually. Both pump pistons have different diameters in order to deliver different delivery volumes. A coaxial cylindrical pumping chamber, which is also connected to separate paste containers via suction valves, is connected to two separate guide passages via separate discharge valves,
Both guide passages extend substantially parallel to the axis, are eccentrically arranged with respect to the pumping chamber, and open to the blocking chamber.

As a result, the three-dimensional shape of the pumping chamber and the guide passage, which are connected to each other, becomes a labyrinth shape. Such a labyrinth-like three-dimensional shape is not only difficult in terms of manufacturing technology, but also remarkably expensive. Therefore, even if the paste dispenser is a so-called one-way “disposable product”, it is not suitable for mass production.

[0007]

The object of the present invention is to provide a metering pump of the type mentioned at the beginning with a second pumping chamber while maintaining the simplicity of the manufacturing technique, which is caused especially by using a bellows as the pumping member. And a second medium simultaneously with the first medium from the compartment of the same paste container or from the second separate container by the second pumping chamber.
The purpose is to enable pressure feeding to a common outlet or separate outlets separated from the medium.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the present invention, two ring wall connecting pipes guided in a telescopic manner are concentric with a bellows at radial intervals. And is integrally formed with either one of the upper and lower casing parts or the other , and the two ring wall connecting pipe pieces form a second pumping chamber for the second medium. second pumping chamber, the second is communicated with a discharge port by at least one pass-through port of the discharge valve及beauty radius direction intermediate wall, and in the second pumping chamber suction side, radial partition walls of the casing lower portion It is connected to the annular chamber of the container surrounding the suction connection piece or the second container via at least one eccentric suction passage provided therein.

[0009]

In the metering pump of the present invention, the bellows as a single pumping member act simultaneously in two separate pumping chambers, and the two media are metered through the two pumping chambers at different ratios. Then, it is possible to discharge and convey to a common outlet or separate outlets. In that case, it is possible to control or change the discharge amount ratio of both media by the volume of the pumping chamber and also by the cross-sectional area ratio between the suction port and the flow cross section on the discharge side.

Another advantage of the metering pump according to the invention is, above all, that no additional separate component is required to form the second pumping chamber, rather the means used are inherently present in any case. It is made up of a molding element which is integrally molded into the existing component, a further important advantage being that the additional molding element does not result in high assembly costs.

The advantageous embodiments according to claims 2 to 5 contribute to obtaining a reliable and functional construction which is simple and easy to assemble, whereas claims 6 to 10 In the embodiment described, it is possible to simultaneously withdraw two media from two separate vessels to which a metering pump can be connected in a very simple manner, for example in a 1: 1 volume ratio or in other volume ratios. Become. The metering pump of the present invention can also discharge only one kind of medium from one container, in which case one of the two pumping chambers is not working at all. That is.

Claims 11 and 12 relate to advantageous embodiments for the outlet or the outlet passage.

[0013]

Embodiments of the present invention will now be described in detail with reference to the drawings.

The paste dispenser shown in FIGS. 1 and 12 has a metering pump 1 incorporated as a head part. The metering pump mainly comprises two cylindrical casing parts 2, 3, a bellows 4, a suction valve 5 and a discharge valve 6. While both casing parts 2 and 3 consist of a shape-stable hard plastic, the bellows 4 consist of a relatively soft plastic which is elastic in shape, which at the same time also corresponds to the casing part 3. It is possible to generate the return force required for the pumping action of the casing part 2. Metering pump 1
Has an easily removable protective cap 7 that will be removed during use.

The casing part 2 comprises a cylindrical lower casing part 8 and an upper casing part 9 which is fittedly and frictionally connected to the lower casing part and which has an outlet 10. The outer end of the discharge passage 11 is formed. The casing upper part 9 has a beveled lid wall 12 with ribs on its upper surface, which lid wall
Formed integrally is a substantially cylindrical chamber wall 14 which seats in a liquid-tight manner on a radial intermediate wall 13 of the lower casing part 8. The chamber wall 14 has a discharge chamber 15 communicating with the discharge passage 11.
And is itself surrounded by an annular passage wall 21, which is also cylindrical and which communicates with the exhaust passage 11 via two side ports 23, 24. It surrounds 22. The annular passage wall 21 is also seated liquid-tight on the radial intermediate wall 13. As can be seen from FIG. 7, the discharge passage 11 and the discharge port 10 have a horizontal cross-sectional shape of an elongated hole when the axis of symmetry is positioned vertically. / 1,10 / 2 and two parallel walls 11 / 1,11 / 2 connecting the semi-circular walls. The inner surfaces of the two semi-circular walls 10/1 and 10/2 each have a plurality of axially parallel guide ribs 57, which form strip groove channels 58 (see FIG. 5). The second medium is added in strips to the delivery strand of the first medium via the groove channels.

The lower casing part 8 penetrates into the guide cylinder 17 by means of the lower cylindrical guide section 16 so that the lower casing part 8 of the guide cylinder 17 and the inwardly facing ring ribs 18 and the casing part 3 of the guide cylinder 17 are connected. It is possible to move with the radial wall 19 by an axial stroke H.

The casing upper part 9 shown as a separate component in FIGS. 5, 6 and 7 has a ring-shaped locking rib 27 and a ring collar 29 which sits on the upper end face 28 of the outer wall 25. The upper part of the cylindrical wall section 9'has variously shaped wall sections which are substantially at an angle of about 45 ° with respect to the outlet 10 or the central axis of the metering pump. Oriented to match the extending discharge passage 11.

Above the radial intermediate wall 13, the peripheral wall 25 of the casing lower part 8 has an annular locking groove 26 on the inner wall surface, which locking groove 27 is a locking rib 27 of the casing upper part 9.
It is for locking the.

On the lower surface of the radial intermediate wall 13, there is integrally formed a cylindrical ring-down connecting pipe piece 30 which is concentric with the bellows 4 and opens downward. The ring-wall connecting pipe piece is a casing. It is telescopically and liquid-tightly housed in a ring-shaped connecting wall piece 31 which is also integrally cylindrical and is open upwards, which is formed integrally with the radial wall 19 of the lower part 3. The inner diameters of both the ring wall connecting pipe pieces 30 and 31 have a predetermined radial distance from the peripheral surface of the bellows 4 and cooperate with the bellows 4 to form an annular second pumping chamber 33. Have been chosen as. It is well known that the first pumping chamber 32 is formed by the hollow chamber of the bellows 4.

The second pumping chamber 33 communicates with the annular passage 22 by a plurality of axially parallel passage ports 34 which are arranged in the radial intermediate wall 13 in a distributed manner.

A ring valve seat conical surface 20 is provided at the center of the radial intermediate wall 13, and a cylindrical connecting pipe piece 35 is connected downward to the ring valve seat conical surface. The connecting pipe piece 35 is surrounded by a ring wall 36 opened downward at a predetermined radial interval, and the ring-shaped upper end wall 37 of the bellows 4 is supported on the ring wall 36. There is. The upper end wall 37 has, at its center, a collar 38 that liquid-tightly surrounds the connecting pipe piece 35.

The discharge valve 6 is a valve closing member 39 which is movable in the axial direction.
Has a closed cone configured as a hollow body, which is guided in the cylindrical connecting piece 35 by an axial cross rib 40 and has an axial upper end. An elastic ring collar 41 is provided which elastically abuts the flattened lower edges 42 of the radial ribs 43 of the casing upper part 9 and which causes the lower limit edge 44 of the valve closing member 39 to pass through the ring valve. It closely contacts the conical surface 20. The ring collar 41 has a plurality of passages which cannot be recognized from the drawing, and the medium can flow in the axial direction through the passages.

The lower end of the bellows 4 has a ring wall 45 which liquid-tightly surrounds a cylindrical peripheral wall 46 of a concentric cup-shaped receiving tube piece 47 which extends in the delivery direction. The housing tube piece 47 has a ring-shaped end wall 48 at one end,
A downward connecting pipe piece 49 is integrally formed with the ring-shaped end wall. The connecting pipe piece 49 has a cylindrical inner peripheral surface 50 and an outer peripheral surface 51 that is downwardly tapered. A valve closing member 52, which is movable in the axial direction of the suction valve 5, is located in the connecting pipe piece 49, and the valve closing member is a conical closing plate 53.
Contacts the conical surface 54 of the valve seat. The valve closing member 52 has a cross rib 55 on the lower surface of the closing plate 53, and the cross closing rib guides the valve closing member along the cylindrical inner peripheral surface 50 of the connecting pipe piece 49. On the upper surface of the ring-shaped end wall 48 of the housing pipe piece 47, a total of three holding fingers 56 that prevent the valve closing member 52 from coming off are arranged.

Radial wall 19 of cylindrical casing part 3
The underside of the housing is particularly preferably integrally molded with a cylindrical or oval cross-section 60, which is used to completely house a paste container 61 having a suitable cross-sectional shape. And has a ring-shaped thick bead edge portion 62 at the lower end. As shown in FIGS. 1 and 3, the paste container 61 having a relatively thin wall has a follow-up piston 64 introduced into an open lower end 63, and the lower end 63 has a peripheral wall 66 substantially. It has a ring collar 68 which, together with the conically expanding end section 65, forms an annular groove 67, which has an inwardly directed upper edge 69. Accordingly, when the paste container 61 is fitted into the exterior body 60 from below, the thick bead edge portion 62 of the exterior body 60 is introduced into the annular groove 67 and locked. The thick bead edge portion 62 and the ring brim 68 provide the outer shape body 60 and the lower end portion of the paste container 61 with enhanced shape stability. Since it is not necessary to give special consideration to avoid inconvenient deformation when inserting or pulling out, the operation is simplified from that point of view.

The paste container 61 (FIG. 3) has on its upper end wall 71 a collar 72 which projects toward the suction valve 5 of the metering pump 1. The collar 72 has an inwardly directed seal ring 74 integrally molded with the end wall ring 73, which is cup-shaped through a thin ring-shaped cut-out web 75 (FIG. 3). The cut-out closing body 76 is integrally formed.

When the paste container 61 is completely pushed into the exterior body 60 of the metering pump 1, the cut-off closing body 76 is automatically cut off from the seal ring 74 and pushed into the paste container 61, and by extension In order to be able to form an outlet port for the paste contained in the paste container 61, the lower end face of the connecting piece 49 of the casing part 3 is provided with a plurality of distributed axial struts. 7
7, an open bar 78 is integrally molded, which cuts the cut-out closure 76 from the sealing ring 74. The open tap 78 has a plurality of pressure fingers 79 which seal the cut-off closure 76 when introducing the collar 72 of the paste container 61 into the receiving tube piece 47 of the casing part 3. Cut from ring 74,
And as shown in FIGS. 1 and 12, the cut-off closure 76
Is pushed into the paste container 61.

A cylindrical suction connection tube piece 80 is integrally formed on the upper end wall 71 of the paste container 61 as an extension of the collar 72 which is directed downward into the container.
An annular chamber 81 surrounding the suction connecting pipe piece 80 is provided for accommodating a second medium, and the second medium is the second medium.
It is pumped into the discharge passage 11 via the pumping chamber 32, the passage port 34 and the annular passage 22. For this purpose, the radial wall 19 of the casing part 3 has one or more, particularly preferably three, suction passages 82, which are arranged around the cylindrical peripheral wall 46 and the ring wall connecting piece 31. Is located in a radial area located between and and opens into the second pumping chamber 32. The suction passage 82 is extended downward by a sleeve-shaped attachment portion 83, which is connected to the suction connection pipe piece 80.
End wall 7 eccentrically and appropriately distributed outside of the
At the same time, it serves to pierce the one cut-off closure 84 to bring the suction passage 82 into communication with the annular chamber 81 of the paste container 61.

In order to facilitate the puncture of the cut-out closing body 84, the lower edge of the sleeve-like attachment portion 83 is formed into a sharp edge, and in order to turn the cut-out closing body 84 sideways at the same time as cutting it off. , Sleeve-like attachment 83
The lower end edge of is extended obliquely.

Since the open bar 78 is connected to the downward connecting pipe piece 49 by the axial web 77, the paste contained in the paste container 61 flows into the connecting pipe piece 49 without any trouble. It is possible,
Alternatively, while the casing part 2 moves upward again after the downward stroke movement, the paste is applied to the connecting piece 49.
It is sucked into the inside of the bellows 4 through. At the same time, a remarkably small amount of the second medium is sucked from the annular chamber 81 into the pumping chamber 33 having a smaller volume.

In order to close the suction passage 82 in a valve-like manner, that is to say to form a second suction valve 5'for the second pumping chamber 33, the peripheral surface of the cylindrical lower end section of the bellows 4 is elastic. It is even more advantageous to integrally mold a conventional ring-shaped valve lip 85, which prevents the backflow of medium from the second pumping chamber 33 into the suction passage 82 while during suction operation. The follow-up flow of the second medium into the second pumping chamber 33 is allowed.

However, it is also possible to omit the valve lip 85. For this purpose, of course, the total flow cross-sectional area of the suction passage 82 is made smaller than the total flow cross-sectional area of the plurality of passage ports 34 of the radial intermediate wall 13 of the upper casing part 2. During the downward working stroke of the upper casing part 2, a sufficiently large blocking pressure is generated in the second pumping chamber 32, and the blocking pressure causes the second medium to be discharged through the passage port 34 and the annular passage 22.
It is necessary to be able to transfer to.

In the embodiment of the metering pump 1 shown in FIG.
The passage port 34 of the radial intermediate wall 13 is covered on the upper side by a resilient ring lip 34/1 in the form of a one-way valve. The ring lip 34/1 thus forms the second discharge valve 6 '. The ring lip 34/1 is located on the lower end surface side of the annular passage wall 21 and is centered on the annular passage wall by an inner centering portion 34 '.

The radial wall 91 of the follow-up piston 64 is arranged so that when the follow-up piston 64 reaches the upper end wall of the paste container 61, as little paste as possible remains in the paste container 61. It has an annular recess 92 in the center, into which the suction connection tubing 80 and the open ejector rod 78, and possibly also the cut-out closure 76, can enter.

In another paste dispenser shown in FIGS. 8 to 11, the outer casing 60/1 is integrally formed on the circular partition wall 100 of the lower casing portion 3/1, and the outer casing is made of the following piston 101. Two cylindrical rubber-like paste containers 61/1 and 60/2 having the above are accommodated directly next to each other in a parallel state so as to be exchangeable. According to the cross-sectional shape shown in FIG. 9, the exterior body 60/1
Has two semi-circular wall portions 107, 108 symmetrically arranged with respect to the axis of symmetry 106, both semi-circular wall portions being connected to each other by straight wall portions 109, 110 parallel to each other. ing.

Although both paste containers 61/1 and 61/2 can have the same shape, they do not necessarily have to have the same shape. Upper end wall 102, 1 of paste container
Each of the 03 has a cylindrical connection port 104, 105 arranged near the periphery, that is, eccentrically arranged, which connection port is in its original state rupturable or pierceable into the container, for example. It is sealed by a closing cover. On the upper surface of the circular partition wall 100, the casing lower part 3/1 of the metering pump 1/1 is integrally formed by eccentrically shifting with respect to the axis of symmetry 106. In this case, the metering pump 1/1 has a principle. Specifically, it is configured similarly to the metering pump 1 of the above-described embodiment. Both metering pumps 1 and 1/1
The differences that exist between and are described below.

The upper casing part 2/1 differs from the casing part 2 in that the ring wall connecting piece 30 / forming the upper radial limit of the second pumping chamber 33/1.
1 has a relatively large diameter, so that the second pumping chamber 33/1 obtains a pump volume equal to that of the first pumping chamber 32. Therefore, the lower ring wall connecting pipe 31/1 (which has a circular partition wall 100) is inserted into the upper ring wall connecting pipe 30/1 in a telescopic manner in a liquid-tight manner.
Has a larger diameter).

Two separate paste containers 61/1, 61
Circular partition wall 10 instead of the exterior body 60/1 that houses / 2
It is also possible to directly mold the two paste containers directly to 0.

Instead of the outer package 60 (FIG. 1), it is also possible to employ a paste container integrally formed with the radial wall 19.

Bellows 4/1 cylindrical upper end section 38 /
1 surrounds a ring wall 36/1 which concentrically surrounds the connecting piece 35 at radial intervals (FIG. 1).
1). On the outer peripheral surface of the upper end section 38/1, the second discharge valve 1
11 is integrally molded with an upwardly curved elastic ring lip 112 forming the movable valve closing member, said ring lip contacting the inner surface of the ring wall connecting pipe 30/1 and sealing in the reverse flow direction. To do.

Bellows 4/1 cylindrical lower end section 45 /
1 is seated liquid-tight in an upward ring collar 47/1, which, together with the ring wall connecting pipe piece 31/1 of the circular partition wall 100, has an annular passage 11 open upwards.
3 is formed. Inside the ring collar 47/1, concentrically with the ring collar, there is an upwardly open ring attachment portion 11 having a rounded chamfered outer peripheral surface as a valve seat surface.
4 is provided on the ring attachment through a plurality of axial connecting webs and the lower end section 45 of the bellows 4/1.
The cap-like valve closing member 115 integrally formed with the / 1 seats with an elastic action and a sealing action. The cap-like valve closing member 115, together with the ring-attached portion 114, forms a first suction valve 116 of the metering pump 1/1 located inside the bellows.

Cylindrical hollow chamber 117 of the ring-attached portion 114
Is in communication with the again cylindrical suction passage 118/1 of the first eccentric suction connection stub 118, said suction connection stub entering the connection port 105 of the right-hand paste container 61/1. And the paste container 61 /
When fitting 1 into the housing 60/1, the closure cover of the connection port 105, which is still present, is cut off. Substantially similarly, the annular passage 113 communicates with the second suction passage 117/1 of the second suction connection pipe piece 119, which is symmetrical with respect to the suction connection pipe piece 118 with respect to the axis of symmetry 106. And is intruded into the connection port 104 of the left-hand paste container 61/1.

An elastic ring lip functions as the second suction valve 120 arranged in the second pumping chamber 33/1, which ring lip is the lower end section 35 / of the bellows 4/1.
1 is integrally formed on the outer periphery of the ring wall connecting pipe piece 3
The inner peripheral surface of 1/1 is liquid-tightly contacted, covers the annular passage 113, and is closed in the reverse flow direction.

As can be seen from the cross-sectional view shown in FIG. 10, in the embodiment of FIGS. 8 to 10, the discharge passage 111/1 or the discharge outlet 110/1 extends parallel to the axis of symmetry 106, that is to say perpendicular to it. Direction partition wall 121, the partition wall including a discharge passage 111/1 and a discharge port 110/1.
Is divided into two sections 111/2 and 111 / having the same cross-sectional area.
It is divided into 3. In this case, the partition wall 121 is connected to the outlet 1.
End at 10/1 to partition only the discharge passage 111/1 and / or compartments 111/2 and 1 with different cross-sectional areas.
It is also possible to arrange the partition wall 121 so as to produce 11/3.

As one can easily imagine, the paste dispensers of both embodiments work in principle in an equivalent manner.
That is: every time the casing upper part 2 or 2/1 makes a downward stroke, ie a working stroke towards the radial intermediate wall 13 or the partition wall 100, both pumping chambers 3
1, 33 or a part of the medium present in 33/1 is a discharge passage 11 or a division 11 of a divided discharge passage 111/1
It is transported outward through 1/2, 111/3. Then a suction stroke is carried out by the restoring force of the bellows 4 or 4/1, the upper part of the casing 2 or 2/1
While returning to the original upper limit position again, both media contained therein are pumped from the annular chamber 81 and the remaining hollow chambers of the paste container 41 or from both paste containers 61/1 and 61/2. 32, 33; Inhaled into 33/1. Both pumping chambers 32, 33; 32, 33 in that case
The discharge amount of / 1 is matched to the amount ratio in which both media are used each time. The amount ratio of medium A: medium B contained in the paste container 61 is about 1:10. Further, the discharge amount ratio of both pumping chambers 32 and 33 is also corresponding. On the other hand, when the paste containers 61/1 and 61/2 have the same size, the volume ratio of the medium A to the medium B is 1: 1, so the discharge capacities of both pumping chambers 32 and 33/1 are also equal. equal.

The particular advantage of the metering pump 1 or 1/1 of the invention is, inter alia, that no additional single component is required to form the second pumping chamber, rather the use component is naturally present. It consists of a molding element which is integrally molded into the component. Yet a further important advantage is that the addition of the molding element never leads to high assembly costs.

[Brief description of drawings]

1 is a longitudinal sectional view of a paste dispenser equipped with a metering pump according to the form of the invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a cross-sectional view of a cartridge case-shaped paste container.

FIG. 4 is a sectional view of the upper part of a metering pump according to a different embodiment.

FIG. 5 is an enlarged sectional view of a casing upper portion.

6 is a cross-sectional view taken along line VI-VI of FIG.

7 is an end view of the outlet viewed in the direction of arrow VII in FIG.

FIG. 8 is a longitudinal sectional view of a paste dispenser equipped with a metering pump according to the invention and two equal-sized paste containers each having a follower piston.

9 is a sectional view taken along line IX-IX in FIG.

10 is a cross-sectional view taken along line XX of FIG.

11 is an enlarged sectional view of the metering pump shown in FIG.

FIG. 12 is an enlarged cross-sectional view of the metering pump shown in FIG.

[Explanation of symbols]

1; 1/1 metering pump, 2,3 cylindrical casing part, 2/1 casing upper part, 3/1
Lower casing part, 4; 4/1 bellows, 5
Suction valve, 5'second suction valve, 6 discharge valve, 6'second discharge valve, 7 protective cap, 8
Lower casing part, 9 Upper casing part,
9'cylindrical wall section, 10 outlet, 10 /
1, 10/2 semi-circular wall, 11 discharge passage, 1
1/1, 11/2 Parallel wall, 12 Lid wall, 13
Radial middle wall, 14 chamber wall, 15 discharge chamber,
16 cylindrical guide sections, 17 guide cylinders,
18 inward ring rib, 19 radial wall,
20 ring valve seat conical surface, 21 annular passage wall, 2
2 circular passages, 23, 24 side ports, 2
5 peripheral walls, 26 locking grooves, 27 locking ribs, 2
8 upper end face, 29 ring collar, 30, 31; 30
/ 1,31 / 1 Ring wall connecting pipe, 32 1st
Pumping chamber, 33; 33/1 annular second pumping chamber, 34 passage port, 34 'centering part, 34/1 ring lip, 35 cylindrical connecting pipe piece, 35/1 bellows lower end section, 3
6; 36/1 Ring wall, 37 Upper end wall, 3
8 colors, 38/1 cylindrical bellows top section,
39 Closing cone as a valve closing member, 40 Axial cross ribs, 41 Ring collar, 42 Flat lower edge,
43 radial ribs, 44 lower edge, 4
5 ring wall, 45/1 cylindrical bellows lower end section, 46 cylindrical peripheral wall, 47 receiving tube piece,
47/1 ring collar, 48 ring-shaped end wall, 4
9 downward connecting pipe piece, 50 cylindrical inner peripheral surface, 5
1 conical outer peripheral surface, 52 valve closing member, 53 conical closing plate, 54 conical surface of valve seat, 55 cross rib, 56 retaining finger, 57 guide rib,
58 strip groove passages, 60, 60/1 exterior body, 61; 60/2, 61/2 paste container,
62 thick bead edge, 63 lower end, 64
Following piston, 65 end section, 66 outer peripheral wall, 67 annular groove, 68 ring collar, 69
Inward upper edge, 71 upper end wall, 72 collar, 73 end wall ring, 74 seal ring,
75 tear-off web, 76 tear-off closure, 77
Axial stanchions, 78 open butt bars, 79 pressure fingers, 80 suction connection tubing, 81
Annular chamber, 82 suction passage, 83 sleeve-like attachment part, 84 cut-off closure, 91 radial wall,
92 annular recessed part, 100 circular partition wall, 102,
103 upper end wall, 104, 105 connection port, 106 axis of symmetry, 107, 108 semi-circular wall portion, 109, 110 straight wall portion,
110/1 discharge port, 111 discharge valve, 11
1/1 discharge passage, 111/2, 111/3 section,
112 ring lip, 113 annular passage,
114 ring attachment part, 115 valve closing member, 1
16 Suction Valve, 117 Cylindrical Hollow Chamber, 11
7/1 2nd suction passage, 118 1st suction connection pipe piece, 118/1 1st suction passage, 119 2nd suction connection pipe piece, 120 2nd suction valve, 121
Partition wall

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ernst Weag Filingen-Schwenningen 22 Germany Eurstraße 18 (56) References JP 64-70162 (JP, A) JP 60-90996 (JP, JP, A) JP-A-4-269386 (JP, A) JP-A-4-276191 (JP, A) Patent 3288429 (JP, B2) (58) Fields investigated (Int.Cl. ⁷ , DB name) F04B 9 / 00-15/08 F04B 43/00-47/14 F04B 53/00-53/22 B65D 47/34

Claims (12)

(57) [Claims] 1. A plastic material for delivering a metered, low-viscosity, particularly pasty medium quantity from a bottle-shaped, capsule-shaped or tube-shaped container having a spring-elastic bellows as a pumping member. A metering pump, wherein the bellows connects between a shape-stable casing upper part and a shape-stable casing lower part which is telescopically movable coaxially with respect to the casing upper part. are arranged to, and the interior of the bellows forms a pumping chamber for pumping by the pumping action of the medium, moreover the upper end portion of the bellows, one of the at no less least one paste passage port及beauty It closely adheres to the ring wall of the radial middle wall of the upper casing part with the discharge valve, and the bellows lower end part of the radial partition wall of the lower casing part. A suction valve and a suction connecting pipe piece for communicating the container with the pumping chamber, the suction portion being in close contact with the ring collar, and the casing upper portion having a discharge port; In a metering pump of the type in which the suction valve is or can be connected to the container by means of a connecting pipe, two ring wall connecting pipes (30,31; 30 / 1,31) guided telescopically to one another / 1) concentrically surrounds the bellows (4; 4/1) at radial intervals and either one or the other of the upper and lower casing parts (2, 3; 2/1, 3/1) A second pumping chamber (33; 33/1) for the second medium is formed by the two ring wall connecting pipe pieces, and the second pumping chamber is the second discharge chamber. Valve (34/1, 11)及beauty least one pass-through port in the radius direction intermediate wall (13) (3
4) in communication with the outlet (10) and on the suction side of the second pumping chamber the radial partition (19; 100) of the lower casing part (3; 3/1).
At least one eccentric suction passage (8)
2; 119), the annular chamber (81) or the second container (61) of the container (41) surrounding the suction connection pipe piece (80).
/ 1), a plastic metering pump for low-viscosity media. 2. A passage port (34) in the radial intermediate wall (13) opens into an annular passage (22) in the upper casing part (2; 2/1) in communication with the outlet (10), The metering pump according to claim 1. 3. A radial ring or valve lip (34) in which the passage port (34) of the radial intermediate wall (13) is elastic.
3. A metering pump according to claim 1 or 2, which is closed by means of / 1) from the annular passage (22) in the form of a discharge valve. 4. A bellows (4/1) has radial ring lips (85, 112, 120) at its upper end and / or at its lower end, respectively, said ring lips connecting both ring wall connecting pipes. Piece (30,31; 30 / 1,31 /
The metering pump according to claim 1 or 2, which is in close contact with the inner surface of 1) and can be alternately separated from the inner surface by the flow force of the second medium. 5. The passage port (34) of the radial intermediate wall (13) is arranged outside the radial region of the chamber wall (14) connected to the upper end portion of the bellows (4; 4/1). The metering pump according to claim 1. 6. The annular passage (22) opens into the discharge passage (11) of the discharge opening (10) via the side ports (23, 24) on two diametrically opposite sides. The metering pump according to any one of 1 to 5. 7. The partition (100) of the lower part (3/1) of the casing is provided with two downwardly directed suction connection pieces (11).
8, 119), wherein the separate hollow chambers of each suction connection piece are in communication with one of the two pumping chambers (32, 33/1), respectively. The metering pump described. 8. Both suction connection pieces (118, 119) are arranged diametrically symmetrically with respect to the axis of symmetry (1 ') and are separate containers (61/1, 61 /).
2) The metering pump according to claim 1, which has penetrated into the inside. 9. The partition (100) accommodates two separate containers each having one follower piston (101) or a rubber-like container (60, 61/1, 61/2) in a replaceable manner. The metering pump according to claim 7 or 8, wherein the exterior body (60, 60/1) for molding is integrally molded. 10. Adjusting device according to claim 7, wherein the second pumping chamber (33/1) has a pump discharge volume which is at least approximately equal to the first pumping chamber (32). Volume pump. 11. The outlet (110/1) and / or the outlet passage (111/1) of the casing upper part (2) is divided into two compartments (111 / 2,1) by a partition wall (121).
11/3) and one of the compartments (11
1/3) is in communication with the annular chamber (22) and the other compartment (111/2) is connected to the discharge chamber (15) or the discharge valve (6) of the first pumping chamber (32) Item 7
The metering pump according to any one of 1 to 10. 12. The discharge port (10) has a discharge passage (11).
12. The discharge passage has an open outer end and the inner surface of the discharge passage has at least partially a strip groove passage (58) formed by a plurality of guide ribs (57). The metering pump according to any one of 1 to 6 above.